Pixel Intensity Analysis for Digital Image

The problem asks us to count the number of pixels in a given $4 \times 4$ digital image whose intensity value ($U$) is less than or equal to 4. The pixel intensities are provided as:

0, 1, 0, 2, 4, 7, 3, 3, 5, 5, 4, 4, 6, 7, 3, 2

Identify Pixels Satisfying the Condition

We need to find pixels where the intensity '$U \le 4$'. Let's examine each pixel value:

• 0: $0 \le 4$ (Yes)
• 1: $1 \le 4$ (Yes)
• 0: $0 \le 4$ (Yes)
• 2: $2 \le 4$ (Yes)
• 4: $4 \le 4$ (Yes)
• 7: $7 \le 4$ (No)
• 3: $3 \le 4$ (Yes)
• 3: $3 \le 4$ (Yes)
• 5: $5 \le 4$ (No)
• 5: $5 \le 4$ (No)
• 4: $4 \le 4$ (Yes)
• 4: $4 \le 4$ (Yes)
• 6: $6 \le 4$ (No)
• 7: $7 \le 4$ (No)
• 3: $3 \le 4$ (Yes)
• 2: $2 \le 4$ (Yes)

Calculate Total Count

Count the number of pixels identified as satisfying the condition '$U \le 4$'.

The pixels satisfying the condition are: 0, 1, 0, 2, 4, 3, 3, 4, 4, 3, 2.

Total count = 11.